摘要:
A colour photographic silver halide material having a support and at least one silver halide emulsion layer, which contains a sensitiser of the formula (I), a stabiliser of the formula (II) and a stabiliser of the formula (III) ##STR1## in which R.sub.1 to R.sub.14, X.sub.1, X.sub.2, X.sup..crclbar., L.sub.1 to L.sub.5 and n have the meaning stated in the description, is distinguished by improved storage stability.
摘要:
A color photographic silver halide with a support and at least one silver halide emulsion layer, the silver halide of which is stabilized by compounds I and II, is distinguished by reduced storage fog combined with stronger gradation: ##STR1##
摘要:
A black & white paper with variable gradation containing a silver chloride-bromide emulsion, which is divided into at least three portions, one of which is sensitised with a blue sensitiser and two further portions are sensitised both with differing quantities of blue sensitiser and with differing quantities of a green sensitiser, wherein the blue sensitiser is of the formula (I) and the green sensitiser is of the formula (II) ##STR1## in which R.sub.1 to R.sub.8, X.sup.(-) and m have the meaning stated in the specification, is distinguished by an extended gradation range.
摘要:
A quick-developing highly sensitive silver halide emulsion distinguished by steep gradation, a minimal increase in fog during storage, improved threshold gradation and low sensitivity to below-threshold pre-exposure is obtained by the addition of a diindoyl disulfide during preparation of the emulsion.
摘要:
The production of a photosensitive silver halide emulsion by precipitation of the silver halide in the presence of gelatine, flocculation and washing of the silver halide precipitated in the presence of the gelatine and redispersion with addition of more gelatine, precipitation being carried out in the presence of a gelatine having a gold number of at most 10 .mu.mol/g gelatine and a cysteine content of at most 6 ppm and redispersion being carried out with a gelatine having a gold number of at least 23 .mu.mol/g gelatine, leads to an emulsion of uniform grain distribution in which undesirably high fogging is avoided.
摘要:
New thioethers of the formula ##STR1## in which Ac represents an acyl radical have been found. They are useful for producing silver halide emulsions for photographic materials.
摘要:
Color photographic recording material containing, on a reflective layer support, at least one blue sensitive, at least one green sensitive and at least one red sensitive layer of binder containing silver halide and optionally other light insensitive layers of binder, which binder has been hardened with an instant hardener, said recording material containing either from 100 to 900 mMol of soluble chloride and from 0 to 50 mMol of soluble bromide per mole of Ag or from 0 to 600 mMol of soluble chloride and from 5 to 50 mMol of soluble bromide per mol of Ag is distinguished by an exceptionally slight storage fog.
摘要:
The sensitivity/fog ratio can be improved by using photographic silver halide emulsions containing gelatine which has a cysteine content of less than 10 ppm and a gold number of .gtoreq.23 .mu.mol/g.
摘要:
Color photographic silver halide material in which at least one layer contains a silver halide emulsion with 95 to 100 mol % of chloride which has been optimally ripened with a combination of at least one sulphur ripening body and at least one compound of the formula ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 denote, independently of one another, hydrogen or alkyl, and X.sup..crclbar. denotes an anion, combines excellent sensitivity with low fog and steep gradation, particularly in the threshold and shoulder region.